メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.5687500 43.3750000, 144.5750000 43.3750000, 144.5750000 43.3791667, 144.5687500 43.3791667, 144.5687500 43.3750000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral